Google AdWords burns - PIN codes can be found without opening the envelope

There was already a topic (and not one) about the fact that Google sends out paper letters with a pin-code. I was also so happy today. What was surprised - the pin-code is on a sticker that can be seen through the window in the letter. Those. to find it out, it is not necessary to open the envelope ... I wonder if any of the postal workers thought of writing it down while the letter was coming from France to Russia? It would be necessary to check, activate, try.



PS Who has friends in the department of incoming international correspondence - you can ask them to just take a picture of all the letters from google and you will have thousands of PIN codes :)